Fix Fullscreen Animation Crash

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index 7eec24016ad9f688415a3dc6ada8a55fd97fe9f0..5af6f47d49676b64f1ea624a50a86f1481bf6995 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -458,6 +458,13 @@ void SetUpBrowserWindowCommandHandler(NSWindow* window) {
   [presentationModeController_ exitPresentationMode];
   presentationModeController_.reset();
 
+  // Explicitly release |fullscreenTransition_| here since it may call back to
+  // this BWC in |-dealloc|. Reset the fullscreen variables.
+  if (fullscreenTransition_) {
+    [fullscreenTransition_ browserWillBeDestroyed];
+    [self resetCustomAppKitFullscreenVariables];
+  }
+
   // Under certain testing configurations we may not actually own the browser.
   if (ownsBrowser_ == NO)
     ignore_result(browser_.release());